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Re: possible role of echolocation in K-T survival
>On Sat, 7 Mar 1998, Matthew Troutman wrote:
>> That certainly is a unique hypothesis. However, this cannot be a
>> factor for all survivors through the K-T. No birds that I know of
>> (besides the oilbird?) echolate.
>Again, the interesting question of how come so few dinosaurs (avian and
>otherwise) manage to exploit the nocturnal niche. The reasons for this
>surely (I would think) go back to small brain size or inferiority of
>collection--or some such important constraint.
What an interesting question it is! It almost seems like dinosaurs
no matter what the variety are, when they go into a nocturnal existance,
are forced into it. The reasons could be many. In Aves, the only
nocturnal birds ( caprimulgiforms, strigiformes, some swifts ) are
related to each other. Caprimulgiformes ( goatsuckers, frogmouths,
nightjars ) are nocturnal and their descendents the Strigiformes ( owls
) are also nocturnal. However, some other descendents, swifts, only a
few live in the dark, and their near relatives ( possible descendents )
the hummingbirds are like all other birds. This is very strange.
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